nest egg

noun
🔊/ˈnest eɡ/
🔊/ˈnest eɡ/
(informal)
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  1. a sum of money that you save to use in the future备用的钱;储备金
    • Over the years she had built up a nice little nest egg for her retirement.多年来,她为退休准备了一个漂亮的小窝蛋。